package com.lsl.menglushishang.android;

import java.util.LinkedList;
import java.util.List;

import android.app.Activity;
import android.app.Application;

public class SysApplication extends Application {
	
	private List<Activity> mList = new LinkedList<Activity>();
	 private static SysApplication instance;

	 private SysApplication() { 
	 }

	 public synchronized static SysApplication getInstance() {
	  if (null == instance) {
	   instance = new SysApplication();
	  }
	  return instance;
	 }

	 // add Activity
	 public void addActivity(Activity activity) {
	  mList.add(activity);
	 }

	 public void exit() {
	  try {
	   for (Activity activity : mList) {
	    if (activity != null)
	     activity.finish();
	   }
	  } catch (Exception e) {
	   e.printStackTrace();
	  } finally {
	   System.exit(0);
	  }
	 }

	 @Override
	 public void onLowMemory() {
	  super.onLowMemory(); 
	  System.gc();
	 }
	 

	
}
